Canon printer not printing in all colours

[Juliasdream]

I have a Canon MG5650 printer. There was still some ink in Magenta but it was saying otherwise so I put in a new cartridge and although it's indicating full the magenta colour does not print
I tried cleaning and nozzle checks but all I achieve is using up ink but still no magenta
I have had to change the settings to greyscale only to get half decent pictures
Could anyone recommend a solution or do I really need to buy a new printer?